Scheduling Physical Downlink Shared Channel Feedback
A wireless device receives, from a base station, a first downlink control information (DCI) scheduling a physical downlink shared channel (PDSCH) transmission. The first DCI indicates: not to transmit feedback for the PDSCH transmission before receiving a second DCI; and a PDSCH group index. The wireless device receives the second DCI indicating: a time slot for transmitting feedback; and the PDSCH group index. The wireless device transmits, to the base station and based on the second DCI indicating feedback for a same PDSCH group index as the first DCI, the feedback for the PDSCH transmission in the time slot.
1 . A method comprising:
receiving, by a wireless device from a base station, a first downlink control information (DCI) scheduling a physical downlink shared channel (PDSCH) transmission, wherein the first DCI indicates:
not to transmit feedback for the PDSCH transmission before receiving a second DCI; and
a PDSCH group index;
receiving the second DCI indicating:
a time slot for transmitting feedback; and
the PDSCH group index; and
based on the second DCI indicating feedback for a same PDSCH group index as the first DCI, transmitting to the base station, in the time slot, the feedback for the PDSCH transmission.
2 . The method of claim 1 , wherein the first DCI comprises:
a first field indicating not to transmit the feedback for the PDSCH transmission; and
a second field for the PDSCH group index.
3 . The method of claim 2 , wherein the second DCI comprises:
a first field indicating the time slot to transmit the feedback for the PDSCH transmission; and
a second field for the PDSCH group index.
4 . The method of claim 3 , wherein the second field of the second DCI indicates the same PDSCH group index as the second field of the first DCI.
5 . The method of claim 2 , wherein the feedback for the PDSCH transmission is hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback.
6 . The method of claim 5 , wherein the first field is a PDSCH-to-HARQ feedback timing indicator field.
7 . The method of claim 1 , further comprising monitoring for the second DCI in response to the receiving the first DCI.
8 . A method comprising:
transmitting, by a base station to a wireless device, a first downlink control information (DCI) scheduling a physical downlink shared channel (PDSCH) transmission, wherein the first DCI indicates:
not to transmit feedback for the PDSCH transmission before receiving a second DCI; and
a PDSCH group index;
transmitting the second DCI indicating:
a time slot for transmitting feedback; and
the PDSCH group index; and
based on the second DCI indicating feedback for a same PDSCH group index as the first DCI, receiving, from the wireless device, in the time slot, the feedback for the PDSCH transmission.
9 . The method of claim 8 , wherein the first DCI comprises:
a first field indicating not to transmit the feedback for the PDSCH transmission; and
a second field for the PDSCH group index.
10 . The method of claim 9 , wherein the second DCI comprises:
a first field indicating the time slot to transmit the feedback for the PDSCH transmission; and
a second field for the PDSCH group index.
11 . The method of claim 10 , wherein the second field of the second DCI indicates the same PDSCH group index as the second field of the first DCI.
12 . The method of claim 9 , wherein the feedback for the PDSCH transmission is hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback.
13 . The method of claim 12 , wherein the first field is a PDSCH-to-HARQ feedback timing indicator field.
14 . The method of claim 8 , wherein the transmitting the first DCI causes the wireless device to monitor for the second DCI.
15 . A non-transitory computer-readable medium comprising instructions that, when executed by one or more processors of a base station, cause the base station to:
transmit, to a wireless device, a first downlink control information (DCI) scheduling a physical downlink shared channel (PDSCH) transmission, wherein the first DCI indicates:
not to transmit feedback for the PDSCH transmission before receiving a second DCI; and
a PDSCH group index;
transmit the second DCI indicating:
a time slot for transmitting feedback; and
the PDSCH group index; and
based on the second DCI indicating feedback for a same PDSCH group index as the first DCI, receive, from the wireless device, in the time slot, the feedback for the PDSCH transmission.
16 . The non-transitory computer-readable medium of claim 15 , wherein the first DCI comprises:
a first field indicating not to transmit the feedback for the PDSCH transmission; and
a second field for the PDSCH group index.
17 . The non-transitory computer-readable medium of claim 16 , wherein the second DCI comprises:
a first field indicating the time slot to transmit the feedback for the PDSCH transmission; and
a second field for the PDSCH group index.
18 . The non-transitory computer-readable medium of claim 17 , wherein the second field of the second DCI indicates the same PDSCH group index as the second field of the first DCI.
19 . The non-transitory computer-readable medium of claim 16 , wherein the feedback for the PDSCH transmission is hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback.
20 . The non-transitory computer-readable medium of claim 19 , wherein the first field is a PDSCH-to-HARQ feedback timing indicator field.